Mill for grinding liquids or powders



Aug. 6, 1940. s. R. N. SMITH MILL FOR GRINDING LIQUIDS OR POWDERS Filed Nov. 25, 1938 Patented Aug. 6, 1940 I 2,210,457

UNITED STATES PATENT OFFICE MILL FOR, GRINDING LIQUIDS OR POWDERS Sidney Richard Nelson Smith, Haglands, West Ohiltington, near Pulborough, England Application November 25, 1938, Serial No. 242,395

In Great Britain November 30, 1937 1 Claim. (01. 83-45) This invention refers to improvements in and the opposite'end abutting against the stepped relating to mills for grinding liquids or powders. aperture 4 of the shoe 4. Thusthe shoes 4, 4 are It is an object of the present invention to procontinually pressed against the inner surface of duce a mill having a minimum number of parts. the cylinder I by the springs I, I, ensuring efiii r It is a further object of the present invention cient grinding of the material as the shaft is ro- 5 to produce a mill in which the parts can be eastated. ily and quickly changed when necessary. It will be obvious that the shaft may be sta- Other objects of the invention will be appartionary and the cylinder may be rotated; or the ent from the detailed description with reference shaft may be rotated and the cylinder may also be to the accompanying drawing, in which: rotated, but in this case the cylinder will be ro- Figure l is a longitudinal elevation partly in tated oppositely to the direction 'of rotation of section of a mill constructed in accordance with the shaft. this invention; and I claim: 7 I

Figure 2 is an enlarged sectional elevationof A mill for grinding liquids or powders compart of the mill. prising a horizontally arranged closed cylinder Referring to the drawing, a horizontally closed provided with inlet and discharge ports, a shaft cylinder I rigidly supported in a frame 9 is prowith a central transverse aperture mounted in vided with an inlet port 5 and outlet port 5 A bearings in the end plates of said cylinder, the shaft 2 mounted centrally in the cylinder I is supcylinder and shaft being relatively rotatable, an ported in bearings in the end cover plates of the arm with reduced ends extending substantially cylinder I and uprights'of the frame 9, one end across the cylinder passing through said central of the shaft 2 projects outwardly and is provided transverse aperture provided in the shaft and with fast and loose pulleys (i for connection in fixed thereto, a helical spring mounted over each the usual way with a source of power for rotating reduced end on said arm, a grinding member, exthe shaft 2. tending substantially the whole length of the cyl- Approximately mid-way of the length of the inder, formed'with a collar on the inner face cylinder I, the shaft 2 is apertured to accomloosely mounted over eachv reduced end of said modate a transverse arm 3. The shoes 4, 4,, arm and spring and the outer face of the grindare each provided with a stepped aperture 4 and ing member being of a corresponding curvature a collar 8. Theends 0f the transverse arm 3 are to the inner surface of said cylinder, the arrangereduced, as at 3 and the reduced ends 3 fit into ment being such that the tension of the springs the stepped apertures l in the shoes I and are will exert pressure upon the grinding members surrounded by the collars 8. Between the collars thereby forcing them into close contact with the 8 and the reduced ends 3 of the transverse arm inner surface of the cylinder.

3 are coiled springs I, I, one end of each abutting against the step on the end of the arm 3, and SIDNEY RICHARD NELSON SMITH. 

